I just got this bike and is already functional. Easy assembly by studying the manual before. The configuration of the onboard computer is a bit tedious but once you understand, it is efficient. Only drawback, it has no memory and when unplugging it loses its data, it is necessary to reprogram the new connecting. Similarly for the second user. Must disconnect and reconnect to access it. It would have been more convenient to switch from one to another without re-enter all data. That said, it is attractive and comfortable pedal stroke, and that's what counts. In addition, the Amazon service spoils nothing, as always at the forefront for the price as for delivery. 2 calls from them to confirm the delivery, which took place in a timely manner. Congratulations. I recommend the bike and Amazon.
I return to my comment, for the user change, I found: no need to unplug (it surprised me anyway), simply hold down the "RESET" and everything resets and choose " U1, U2, U3 ... etc.